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13 de Nov de 2014
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  1. 1 1. WAP to print following series: 1 2 3 4 5 1 2 3 4 1 2 3 1 2 1 class Serie1 { public static void main(String args[]) { for(int i=5;i>=1;i--) { for(int j=1;j<=i;j++) { System.out.print(j); } System.out.println("n"); } } }
  2. 2 Output:
  3. 3 2. WAP to print following series: 1 2 3 4 5 2 3 4 5 3 4 5 4 5 5 class Serie2 { public static void main(String args[]) { for(int i=1;i<=5;i++) { for(int j=i;j<=5;j++) { System.out.print(j); } System.out.println("n"); } } }
  4. 4 Output:
  5. 5 3. WAP to print following series: 1 1 2 2 3 4 4 5 6 7 7 8 9 10 11 class Serie3 { public static void main(String args[]) { int n=1; for(int i=1;i<=5;i++) { for(int j=1;j<=i;j++) { System.out.print(n); n++; } System.out.println("n"); n--; } }
  6. 6 } Output:
  7. 4.WAP to illustrate the use of io package to receive input for different datatypes. 7 import java.io.*; class Testio { public static void main(String args[]) throws IOException { BufferedReader br=new BufferedReader(new InputStreamReader(System.in)); System.out.println("enter int value"); String s=br.readLine(); int i=Integer.parseInt(s); System.out.println("enter short value"); String a=br.readLine(); short sh=Short.parseShort(a); System.out.println("enter long value"); String x=br.readLine(); long l=Long.parseLong(x); System.out.println("enter float value"); String y=br.readLine(); float f=Float.parseFloat(y); System.out.println("enter double value"); String n=br.readLine(); double d=Double.parseDouble(n); System.out.println("enter string value");
  8. 8 String z=br.readLine(); String st=z; System.out.println("enter boolean value"); String t=br.readLine(); boolean b=Boolean.parseBoolean(t); System.out.println("int i ="+i); System.out.println("short sh ="+sh); System.out.println("long l ="+l); System.out.println("float f ="+f); System.out.println("double d ="+d); System.out.println("String st ="+st); System.out.println("boolean b ="+b); } }
  9. 9 Output:
  10. 5.WAP to illustrate the use of StringTokenizer class of util package. 10 import java.io.*; import java.util.*; class Testst { public static void main(String args[]) throws IOException { BufferedReader br=new BufferedReader(new InputStreamReader(System.in)); System.out.println("enter Name,Age,Salary"); String str=br.readLine(); StringTokenizer st=new StringTokenizer(str,","); String s1=st.nextToken(); String s2=st.nextToken(); String s3=st.nextToken(); String name=s1; int age=Integer.parseInt(s2); float sal=Float.parseFloat(s3); System.out.println("Name = "+name); System.out.println("Age = "+age); System.out.println("Salary = "+sal); } }
  11. 11 Output:
  12. 6.WAP to illustrate the use of Scanner class. 12 import java.util.Scanner; class Testscanner { public static void main(String args[]) { int a; float b; String c; Scanner ob=new Scanner(System.in); System.out.print("Enter an int : "); a=ob.nextInt(); System.out.print("Enter a float : "); b=ob.nextFloat(); System.out.print("Enter a string : "); c=ob.next(); System.out.println("a="+a); System.out.println("b="+b); System.out.println("c="+c); } }
  13. 13 Output:
  14. 7. WAP to receive two inputs from user of different data types at same time and print it using Scanner class. 14 import java.util.Scanner; class Testms { public static void main(String args[]) { Scanner br=new Scanner(System.in); System.out.println("enter Name,Age"); String n=br.next(); int a=br.nextInt(); System.out.println("Name = "+n); System.out.println("Age = "+a); } } Output:
  15. 8. WAP to receive one number from user and print table of that number. 15 import java.util.Scanner; public class Table { public static void main(String [] args) { Scanner obj=new Scanner(System.in); System.out.print("enter any number : "); int n=obj.nextInt(); for(int j=1;j<=10;j++) { System.out.print(n+"t"+"*"+"t"+j+"t"+"="+"t"+j*n); System.out.print("n"); } } } Output:
  16. 9. WAP to receive one number from user and print tables up to that number. 16 import java.util.Scanner; public class Table1 { public static void main(String [] args) { Scanner obj=new Scanner(System.in); System.out.print("enter any number : "); int n=obj.nextInt(); for(int i=1;i<=n;i++) { for(int j=1;j<=n;j++) { System.out.print(i+"*"+j+"="+j*i); System.out.print("n"); } } } }
  17. 17 Output:
  18. 10. WAP to except three numbers from the user and print largest among them using if else if statement. 18 import java.util.Scanner; public class Largest { public static void main(String [] args) { Scanner obj=new Scanner(System.in); System.out.print("enter 1st number : "); int a=obj.nextInt(); System.out.print("enter 2nd number : "); int b=obj.nextInt(); System.out.print("enter 3rd number : "); int c=obj.nextInt(); if(a>b && a>c) System.out.print(a+" is greatest number "); else if(b>a && b>c) System.out.print(b+" is greatest number "); else System.out.print(c+" is greatest number "); } }
  19. 19 Output:
  20. 11. WAP to except three numbers from the user and print largest among them using nested if statement. 20 import java.util.Scanner; public class Largestn { public static void main(String [] args) { Scanner obj=new Scanner(System.in); System.out.print("enter 1st number : "); int a=obj.nextInt(); System.out.print("enter 2nd number : "); int b=obj.nextInt(); System.out.print("enter 3rd number : "); int c=obj.nextInt(); if(a>b) { if(a>c) { System.out.print(a+" is greatest number "); } else { System.out.print(c+" is greatest number ");
  21. 21 } } if(b>a) { if(b>c) { System.out.print(b+" is greatest number "); } else { System.out.print(c+" is greatest number "); } } } } Output:
  22. 12. WAP to except three numbers from the user and print largest among them using nested if statement. 22 import java.util.Scanner; public class Largestm { public static void main(String [] args) { Scanner obj=new Scanner(System.in); System.out.print("enter 1st number : "); int a=obj.nextInt(); System.out.print("enter 2nd number : "); int b=obj.nextInt(); System.out.print("enter 3rd number : "); int c=obj.nextInt(); if (a>b && a>c) { System.out.println("largest number is "+a); } if(b>a && b>c) { System.out.println("largest number is "+b); } if(c>a && c>b)
  23. 23 { System.out.println("largest number is "+c); } } } Output:
  24. 13. WAP to show the use of command line arguments. 24 class Democa { public static void main(String args[]) { for(int i=0;i<args.length;i++) { System.out.println("args["+i+"]: "+args[i]); } } } Output:
  25. 14. WAP to illustrate the use of String class methods. 25 class Teststr { public static void main(String args[]) { String s = " HELLO WORLD "; String s2 = "HELLO"; int l=s.length(); System.out.println("lenth():"); System.out.println("lenth="+l); System.out.println("charAt():"); System.out.println(s.charAt(3)); System.out.println("trim():"); System.out.println(s.trim()); System.out.println("toLowerCase():"); System.out.println(s.toLowerCase()); System.out.println("substring():"); System.out.println(s.substring(3,9)); System.out.println("indexOf():"); System.out.println(s.indexOf("L")); System.out.println("equals():"); if(s2.equals("HELLO")) System.out.println("HELLO"); else System.out.println("donot match"); System.out.println("compareTo():"); int ans1,ans2,ans3;
  26. 26 ans1=s2.compareTo("ANNU"); ans2=s2.compareTo("HELLO"); ans3=s2.compareTo("SIMAR"); System.out.println(ans1); System.out.println(ans2); System.out.println(ans3); } } Output:
  27. 15. WAP to shows the use of array of object in java. 27 import java.util.Scanner; class Student { int r; int m[] = new int[5]; String n; Scanner o= new Scanner(System.in); void getdata() { System.out.print("enter rollno: "); r=o.nextInt(); System.out.print("enter name: "); n=o.next(); System.out.println("enter marks in 5 subjects"); for(int i=0;i<5;i++) { m[i]=o.nextInt(); } } void putdata() { int sum=0; System.out.println("rollno: "+r); System.out.println("name: "+n); System.out.println("list of marks");
  28. 28 for(int i=0;i<5;i++) { System.out.println("marks in sub"+(i+1)+" :"+m[i]); sum=sum+m[i]; } int per=((sum*100)/500); if(per<40) { System.out.println("sorry! you are fail"); } else if(per>40 && per<=60) { System.out.println("Division: Third"); } else if(per>60 && per<=80) { System.out.println("Division: second"); } else if(per>80 && per<=100) { System.out.println("Division: first"); } else if(per>100) { System.out.println("invalid result"); } }
  29. 29 } class T { public static void main(String args[]) { Student obj[]=new Student[2]; for(int i=0;i<2;i++) { obj[i]=new Student(); obj[i].getdata(); } for(int i=0;i<2;i++) { obj[i].putdata(); } } }
  30. 30 Output:
  31. 16. WAP to enter the size of row and column for two dimension array, accept values from the user accordingly and print them along with column wise total. 31 import java.util.Scanner; class Carray { public static void main(String args[]) { int r,c; Scanner obj = new Scanner(System.in); System.out.println("enter size of row"); r=obj.nextInt(); System.out.println("enter size of column"); c=obj.nextInt(); int a[][]=new int[r][c]; System.out.println("enter"+r*c+"values"); for(int i=0;i<r;i++) { for(int j=0;j<c;j++) { a[i][j]=obj.nextInt(); } } int s[]=new int[r];
  32. 32 System.out.println("Matrix is:"); for(int i=0;i<r;i++) { s[i]=0; for(int j=0;j<c;j++) { System.out.print(a[i][j]+"t"); s[i]=s[i]+a[j][i]; } System.out.print("nn"); } System.out.println("Columnwise total:"); for(int i=0;i<r;i++) { System.out.print(s[i]+"t"); } } }
  33. 33 Output:
  34. 17. WAP to enter the size of row and column for two dimension array, accept values from the user accordingly and print them along with diagonal total. 34 import java.util.Scanner; class Diagnal { public static void main(String args[]) { int r,c; Scanner obj = new Scanner(System.in); System.out.println("enter size of row"); r=obj.nextInt(); System.out.println("enter size of column"); c=obj.nextInt(); int a[][]=new int[r][c]; System.out.println("enter"+r*c+"values"); for(int i=0;i<r;i++) { for(int j=0;j<c;j++) { a[i][j]=obj.nextInt(); } } System.out.println("Matrix is: ");
  35. 35 int s=0; for(int i=0;i<r;i++) { for(int j=0;j<c;j++) { System.out.print(a[i][j]+"t"); if(i==j) s=s+a[i][j]; } System.out.print("n"); } System.out.println("Sum of diagnal: "+s); } }
  36. 36 Output:
  37. 18. WAP to enter the size of row and column for two dimension array, accept values from the user accordingly and print them along with row wise total. 37 import java.util.Scanner; class Rarray { public static void main(String args[]) { int r,c; Scanner obj = new Scanner(System.in); System.out.println("enter size of row"); r=obj.nextInt(); System.out.println("enter size of column"); c=obj.nextInt(); int a[][]=new int[r][c]; System.out.println("enter"+r*c+"values"); for(int i=0;i<r;i++) { for(int j=0;j<c;j++) { a[i][j]=obj.nextInt(); } } System.out.println("Matrix is: ");
  38. 38 for(int i=0;i<r;i++) { int s=0; for(int j=0;j<c;j++) { System.out.print(a[i][j]+"t"); s=a[i][j]+s; } System.out.print("="+s); System.out.print("n"); } } } Output:
  39. 39 19. WAP to show the use of static variable. class Testn { int n; static int count; void getdata(int x) { n=x; count++; } void getcount() { System.out.println("count: "+count); } } class Testd { Test o1=new Test(); Test o2=new Test(); Test o3=new Test(); o1.getcount(); o2.getcount(); o3.getcount();
  40. 40 o1.getdata(10); o2.getdata(20); o3.getdata(30); o1.getcount(); o2.getcount(); o3.getcount(); } Output:
  41. 41 20. WAP to show the use of static method. class Mathoperation { static int mul(int a,int b) { return(a*b); } static int mul(int a,int b,int c) { return(a*b*c); } } class Statictest { public static void main(String args[]) { int f1=Mathoperation.mul(10,20); int f2=Mathoperation.mul(10,20,4); System.out.println("1st multiplication = "+f1); System.out.println("2nd multiplication = "+f2); } }
  42. 42 Output:
  43. 21. WAP to show the use of parameterized constructor. 43 class A { int a; A(int a) { this.a=a; System.out.println("This is a constructor of class A"); } } class B extends A { int b,c; B(int a,int b,int c) { super(a); this.b=b; this.c=c; System.out.println("This is a constructor of class B"); } void display() { System.out.println("a="+a);
  44. 44 System.out.println("b="+b); System.out.println("c="+c); } } class ParCons { public static void main(String args[]) { B obj=new B(10,20,30); obj.display(); } } Output:
  45. 22. WAP to show the use of default constructor. 45 class A { A() { System.out.println("This is a constructor of class A"); } } class B extends A { B() { super(); System.out.println("This is a constructor of class B"); } } class DefCons { public static void main(String args[]) { B obj=new B(); } }
  46. 46 Output:
  47. 23. WAP to show the use of overriding method. 47 class One { void show() { System.out.println("I am method of class One"); } } class Two extends One { void show() { System.out.println("I am method of class Two"); } } class Testoverriding { public static void main(String args[]) { One o=new One(); Two t=new Two(); o.show(); t.show();
  48. 48 } } Output:
  49. 24. WAP to show the use of method overloading. 49 class Mathoperation { static int mul(int a,int b) { return(a*b); } static int mul(int a,int b,int c) { return(a*b*c); } static float mul(int a,float b) { return(a*b); } } class Testoverloading { public static void main(String args[]) { int f1=Mathoperation.mul(10,20); int f2=Mathoperation.mul(10,20,4); float f3=Mathoperation.mul(10,20.4f);
  50. 50 System.out.println("1st multiplication = "+f1); System.out.println("2nd multiplication = "+f2); System.out.println("3rd multiplication = "+f3); } } Output:
  51. 51 25. WAP to show the use of final method. class One { final void show() { System.out.println("i am belong to class One"); } final void show(int a) { System.out.println("i am variable of class one = "+a); } } class Two extends One { void show1() { System.out.println("i am belong to class Two"); } } class Testfinal { public static void main(String args[]) {
  52. 52 Two t1 = new Two(); t1.show1(); t1.show(); t1.show(10); } } Output:
  53. 53 26. WAP to show the use of final variable. class One { final int x=5; } class Two extends One { void show() { System.out.println("x = "+x); } } class Testfinalvar { public static void main(String args[]) { Two t1 = new Two(); t1.show(); } }
  54. 54 Output:
  55. 55 27. WAP to show the use of final class. class One { void show() { System.out.println("I am method of final class."); } } class Testfinalclass { public static void main(String args[]) { One t1 = new One(); t1.show(); } } Output:
  56. 28. WAP to show the use of abstract method. 56 abstract class Demo { abstract public void calculate(int x); } class Second extends Demo { public void calculate(int x) { System.out.println("square of "+x+" is "+(x*x)); } } class Third extends Demo { public void calculate(int x) { System.out.println("cube of "+x+" is "+(x*x*x)); } } class Testdemo { public static void main(String args[]) {
  57. 57 Second s =new Second(); s.calculate(10); Third t =new Third(); t.calculate(10); Demo d; d=s; d.calculate(10); d=t; t.calculate(10); } } Output:
  58. 29. WAP to show the use of package in classes. 58 package mypack; import java.util.Scanner; public class Student { String n; Scanner o=new Scanner(System.in); public void getname() { System.out.println("enter name"); n=o.next(); } public void putname() { System.out.println("Name = "+n); } } import java.util.Scanner; import mypack.*; class Test1 { Scanner o= new Scanner(System.in); int s[]= new int[3]; void getdata()
  59. 59 { System.out.println("enter the data in 3 subjects:"); for(int i=0;i<3;i++) { s[i]=o.nextInt(); } } void putdata() { int sum=0; System.out.println("marks in 3 subjects:"); for(int i=0;i<3;i++) { System.out.println("s["+i+"]:"+s[i]); sum=sum+s[i]; } System.out.println("Total = "+sum); int per=(sum*100)/300; System.out.println("percentage = "+per); if(per>80) System.out.println("First"); else if(per<80 && per>60) System.out.println("Second");
  60. 60 else if(per>50 && per<60) System.out.println("Third"); else System.out.println("Sorry!you are fail"); } } class My { public static void main(String args[]) { Student o1=new Student(); Test1 m=new Test1(); o1.getname(); o1.putname(); m.getdata(); m.putdata(); } }
  61. 61 Output:
  62. 30. WAP to demonstrate the use of interface which contains two methods one can accept the input and second for displaying input. 62 interface One { void getdata(int x,int y); void display(); } class Super implements One { int a,b; public void getdata(int x,int y) { a=x; b=y; } public void display() { System.out.println("a = "+a); System.out.println("b = "+b); } } class Testinterface {
  63. 63 public static void main(String args[]) { Super s=new Super(); One o; o=s; o.getdata(10,20); o.display(); } } Output:
  64. 31. WAP in which you can implement an interface which contain one method and variable. 64 interface Area { float pi=3.14f; float compute(float x,float y); } class Rectangle implements Area { public float compute(float x, float y) { return(x*y); } } class Circle implements Area { public float compute(float x,float y) { return(pi*x*x); } } class Interfacetest {
  65. 65 public static void main(String args[]) { Rectangle r=new Rectangle(); Circle c=new Circle(); System.out.println("Area of rectangle = " + r.compute(10.1f,20.2f)); System.out.println("Area of circle = " + c.compute(10.0f,0)); } } Output:
  66. 32. WAP to show the use of predefined exception. 66 class Testpre { public static void main(String args[]) { try { int n = args.length; int a = 45 / n; System.out.println("The value of a is :"+a); } catch(ArithmeticException ae) { System.out.println(ae); System.out.println("Arguments are required"); } finally { System.out.println("End of program"); } } }
  67. 67 Output:
  68. 33. WAP to show the use of user defined exception. 68 import java.util.Scanner; class MyException2 extends Exception { static Scanner o=new Scanner(System.in); static int a[] =new int[5]; MyException2(String str) { super(str); } public static void main(String args[]) { try { System.out.println("enter 5 numbers"); for(int i=0;i<5;i++) { a[i]=o.nextInt(); if(a[i]>0) System.out.println("a["+i+"] : "+a[i]); else { MyException2 me= new MyException2("enter positive number");
  69. 69 throw me; } } } catch(MyException2 me) { me.printStackTrace(); } } } Output:
  70. 70 34. WAP to show the use of multi threading. class Mythread implements Runnable { String str; Mythread(String str) { this.str = str; } public void run() { for(int i=1; i<=10; i++) { System.out.println(str+i); try { Thread.sleep(2000); } catch (InterruptedException ie) { ie.printStackTrace(); } } }
  71. 71 } class Theatre { public static void main(String args[]) { Mythread obj1 = new Mythread("Cut the ticket"); Mythread obj2 = new Mythread("Show the seat"); Thread t1 = new Thread(obj1); Thread t2 = new Thread(obj2); t1.start(); t2.start(); } } Output:
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